I rebooted and got another blue screen -- same error.  I took the memory back out, and booted clean again.  Then I downloaded and installed the windows update standalone package available for KB929777.  I rebooted to make sure I got a clean reboot with 2GB ram, which I did.  Then I added the RAM back in and I've rebooted a few times just fine.

I think I may finally be in the clear.  What a pain though!